15.0 mL of 0.50 M HCl is added to a 100.-mL sample of 0.314 M HNO, (Ka for
HNO2,=4.0 x 10-4). What is the equilibrium concentration of No2 ions?

is there multiple choice answers?

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

може ли да зареждате повече информация, моля